#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <vector>
using namespace std;

bool isInterleave(string s1, string s2, string s3) {
    int m = s1.size();
    int n = s2.size();

    if (m + n != s3.size())  return false;

    s1 = " " + s1;
    s2 = " " + s2;
    s3 = " " + s3;

    vector<vector<bool>> dp(m + 1, vector<bool>(n + 1, false));
    dp[0][0] = true;
    for (int i = 1; i <= m; ++i)
    {
        if (s1[i] == s3[i])
        {
            dp[i][0] = true;
        }
        else
            break;
    }

    for (int i = 1; i <= n; ++i)
    {
        if (s2[i] == s3[i])
        {
            dp[0][i] = true;
        }
        else
            break;
    }

    for (int i = 1; i <= m; ++i)
        for (int j = 1; j <= n; ++j)
        {
            if (s1[i] == s3[i + j])
                dp[i][j] = dp[i - 1][j];
            if (s2[j] == s3[i + j])
                dp[i][j] = dp[i][j] || dp[i][j - 1];
        }

    return dp[m][n];
}

int main()
{

	return 0;
}